Plural lamp-socket.



R. B. BENJAMIN. n Y PLUBAL LAMP SOCKET.

APPLIGATIOIILED FEB. 27. 1907. 898,823. Y Patented sept` 15,1908.

2 SHEETS-SHEET 1.

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Patented sepa 15,1908.

' 2 SHEETS-SHEET s.)

R B BENJAMIN PLURAL LAMP SOCKET. APPLIcAHox Hman rma. z?. 1907.

vembodying my invention; Fig. 2 is a. cross- 6, this holt serving to secure the cop 2 to the UNITED STATES REUBEN B. BENJAMIN, OF CHICAGO, ILLINOIS,

PATENT OFFICE.

ASSIGNOR TO ENJMIN ELECTRIC MANUFAC- TURING COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

PLURAL LAMP-SOCKET.

Specification of Letters Patent.

Patented sepsis, 190s l Application le February 27, 1907. No. 359,667.

description, reference being had to the eef' compenying drawing, forming e. part of this specification.

My invention relates to improvements in electric lamp clusters, and particularly tio a. type of lamp cluster that is adapted to be inserted into the ordinary socket or receptacle,. one of the ob'ects of The' invention being the product-ion oi a device of this type which is of simple and economical construction und at the snme time ellicient. and durable.

In the accompanying drawings, in which the same reference. numerals designate like arts throughout the several views, Figure. 1 1s a central vertical sectional view of e device sectional view of the sanne, the section being taken on the line 2 2 of Fig. 1, looking in the direction indicated by the arrows; l" ig. 3 shows, partly in section und partly in elevattion, a slightly Vmodified form of device cmhodying the invention; Fig. 4 is u. cross-sectional view of the same, the section heing taken on the line 4-4 of Fig. 3, looking in the direction indicated bv the arrows; Fig. 5 is e. detail of a portion of the device; und Fig. G is. n. broken sectional view of u further modification.

Referring to Figs. 1 und 2, 1 indicates the lug, formed of insulating nmtcrial, this plug eing provided with n scpuruhle end-piece or cap 2. Carried on thc muin luidy-portion 1 of the plug is e. corruguted contactmember which may conveniently consist of a threaded ring 3 adapted to coperutc. with one ol.' the contacts of the ordinary Edison type of incandescent lump socket. This ringis formed at one of its ends with an inturned flange, or shoulder 4, the opposite end being l provided with an out-turned ihmge or shoull der 5. Extending longitudinally und ccntmlly through the plug 1 is .-x holt or the likemain portion of the plug 1 und to c ennp this cup firmly-down upon the inturncd flange 4. Upon the inner-end ol' the plug 1 is u. plate 7, this plut-e being adapted to serve. ns one of the contacts for all of the lumps which the dcvice is designed to hold. The outer end ofi the bolt 6 serves as the center contact for the plug of the device, while the nut (la, upon the inner end of the bolt 6, serves to secure the plate in place and to bind the whole together- A8 indicates a sleeve of insulating material which is ada ted to poss on over the contact ring 3. Pre erahly this sleeve 8 will he interiorly screw-threaded to correspond with thc 'threads upon this member 3.

9- is e. plate which is adapted to form the outer contact for each ol' the lamps and may support the lamp sockets or holders 10 und 11. These socketsl() und 11 ore in the form of shells screw-threzulcdV to receive the screwthreuded' outer terminals of incandescent lamps of the Edison type. The plate 9 is formed with its op msite ends 12 dhd13 npproaching each otlter, these inturned ends overlapping the out-turned lhmg 5 upon the ling 3.

14 is a disk of liber or shnihuinsulating material formed with u central circulan' opening und adopted to lic slipped on over the outer cont-:1ct member Il lwl'ore the sleeve S is placed thereon. when this sleeve S is screwed down firmly, thc ends l2 und 13 of the plate l), :md the disk 14, :irc securely clamped between the lhtnge 5 und the` slee ve S. This forms a very strong und 'rigid structure.

15 is u circular cover or casing adapted to engage around its periphery the edge. of the disk 14 and to inuhe u tight jointA tlwrewith. This cover or casing 15 is formed with suitable openings therethrough for the lump sockets 10 and 1 l.

16 und 17 nrc metallic rings or shells secured in these o cnings in the cover 15. The sockets 10 undl t1 ure insulated from` the shells 16 :md 17 hy rings 1b und 1-9 of iiocr or similar material.

The circuits through the device nrc from the outer end of the holt.- L, through this bolt -to the plate 7, from this pluto through the center contacts ol the lamps and the lilancnts of these lumps to the outer rin" contzu ts of said lmnps, then through the pelote 9.

to the threaded contact member 3.

In the form of the device shown in Figs. 3 :md 4 the inturned ends 12 und 13 oi' the plate 9 do not overln i the llunge 5 on the Contact sleeve 3 and do not directly engage this flange. A tiat metallic ring 2G is supported hy the llnngc 5 and to this ring is setartiner.' .'t'ff t end of said plug, electric cured, by rivet-s or otherwise, the in turned ends of the late 9, electrical connection being establis icd between the sleeve 3 and plate 9 through this rino' 20.

In the form of the device shcxm in F 6, a metallioeover-plate .21 is interposed between the iber disk 14 and the noneonducting sleeve S. This disk 21 is centered by a pro- `ection or shoulder 22 upon the sleeve 8.

Ilien this late 21 is used it forms, in combination vit-1 the cover 15, a complete metallic casing for the device.

I claim:

l. In a plug-cluster, a plug of insulating material carrying a plurality of lamp-holding devices, a centra and an outer cont-act nic-inber upon said plug to cooperate with the. con tac-ts of a suitable socket, said outer contact 'member having a shoulder upon its inner endand a lamp-terminalscontacting plate supported bv said shoulder.

I2. In a plug-cluster the combination of a plug carrying a plurality ci" lmnp-holding devices, a cent-ral and an outer contact member upon said plug to cooperate with the contacts of aY .suitable socket, said outer contact member having a lianged inner end, and a contact-plate carried by and in electrical connection with said flange.

3. In a plug-cluster the combination ol a plug,r carrying a plurality of lain p-holding devices, a central andan outer contact member upon said plug to cooperate with the contact-S of a suitable socket, said outer contact member having an ont-turned inner end, and a lamp-terminal-contacting plute'supportcd by said out-turned end. 4. In a plug-cluster the combination of a plug carrying aplurality` o? latino-holding de vices, a central contact upon t ie outer end of said plug, acontact-pla..` upon the inner connection between said center cmitaetv said plate, an outer Contact. member upo: aid ilug, said member being,r foiincd wit ii shoulder adjacent the inner end of th plug,and acontact-pla-te supported bj.' :uid in electrical connection with said slfwulder.

i 5. 1n a plug-clusterl` :i plug adapted to coo erate with a suitable socket and cariving a nurality of lamp-holding devices, said plu; r having a center contact upon its outer end and au outer contactutciubcr extending longitudinally thereof, :i plate secured to the iiincr cud of said outer contact iiiciiilicr and forming a laiup-tcriuiuul contact [or each of thc lamps, and a plate upon the inner cud ol' the plug and in electrical connection willi tln` center contact of said plug, said last-named plato formingr the other contact for cach ol the lamps.

6. In :i plug-cluster, a plug ol insulating material, an outer contactiucmber carried by said plug, said member having :iii intunied end and a removable cap formed ol' insulatinel material and adapted to be applied to t ie end of the plug and, when so ap plied, to clamp the inturncd end of said contact member between itself and said plug, and a lamp-holding device carried by said plug and having a contact electrically' connected with saidbouter contact member.

7 In a plug-cluster, a plug formed of noneonducting material, an outer contact member carried by said plug, said member having one. of its ends inturncd, zi. cap adapted to be applied to the outer end of the plug and to confine between itself and said plug the inturncd end of said contact member, and a bolt: adapted to secure said parts together and also to forma. center contact for said 8. The combination of a plug, a corrugated contact. member extending longitudinally of the plug and having a flange. on its inner end, and a lamp-terminfil-contacting plate supported by said corrugated member. 9. The combination of a plug carrying a. plurality of lamp-holding devices and having acenter contact upon its outer end, an outer contactmember upon said plug, and a lamptcrininal-eontacting plate supported by said outer contact.

10. The combination of a plug carrying a plurality of lamp-holding devices and having a. center contact upon its end, an outer contact member upon said plug and a lamp-terminaleontacting plate supported by and in electrical contact with said outer Contact member.

tt. The combination of :i plug carrying :1

minatcontact-plate supported by and in elec-- trical connection with said outer contact member.

12. ln a plug-cluster thc combination of a two-part plug, an outer contact; member on.

the plug, said member having .-iu intox-ucd cud adapted to be clamped between thc parts of the plug, a bolt .extending longitudinally through the plug and holding the part-s of the plug together, oiieeiid ol' said bolt, forming a center contact for said plug, and a plate electrically connected with said bolt and adapted lo l'oi'iuoiio of the contacts foreach of a plurality of linups.

I3. lu a plug-cluster the combination of a tuo-part. plug, n corrugated contact member on the plug, said member having an inturned ilzuige adapted to be clamped between thc parts of the plug, :i bolt. extending longitudimiliyV through lluplug and serving to secure tho parts ol the plug together, one cud ol the bolt forming thc center contact for the plug, and :i plate upon the inner end ol' said plug, said plate being electrically connected with said bolty and adapted to lortu one of tbc contacts foreach ol :i plurality of lamps.

H. ln ai plug-cluster the emubinatiun of a Lun-part plug, :i corrugated member on the plug. will member having nu imurned flange adapted le be clamped beiween the parts of the plug, :i bult extending lungitudinally iln'ougli the plu"r and serving tu secure the )arts uf the plug togefher, one end of said boltA providing the eenter Contact for the plug, .find a plate leeured t0 the opposite end of said bolt, .said pluie adapted tu form one of the contacts for each of a pluraliti of lamps.

15. In a. plug-cluster, a plug having an Guter enntaet member thereon, said eonuet member being` provided with a laugre. a lamplez'minal-enntacling plate having its ends aduped to extend over seid fla-nge., :sindv a sleeve of nuncunduel-ing nniterial adapted to hey passed en over the. outer centaetmember and tu clamp said pluie between itself and said liange.

1G. In :i plug-cluster, a plug having an out-er contactmember thereon, said Contact member beineT provided wih a flange, a laan supporting pluie having iis ends idzied to exend over said ilnnge, and a. sleeve of insulating material adapted tu be passed on @ver the center eunuet and in clamp the lampsupportingplate between itSelf sind said flange.

1T. In n. plug-cluster, the combination of a. plug having :in cuter cnntuei member entending lengthwise uf said plug, n lamp-supporting plate ,-m'ri'ed upon the inner end of contacting members for each of the lamps, a

second plate upon the inner end of said plug,

and a bult. passing longitudinally through said plug and adapted to secure the said lastnnmed plate to the plug und to constitute a. cener Contact for said plug.

i8. In a plug-cluster, the combination of a two -pin't plug, a threaded centaet. ring sleeved upon said plug, said ring haing an inturned iange upon one of its ends and au out-turned flange upon its opposite end, means extendingv longitudinally through the plug and serving to secure file pnrls of Said plug together, said means adapted also to provide a center Contact and to conduct Cur said unter eunlaet` member, said plate beingrh adapted te ferm one. of the lamp-ternnnal-- rent t0 the center contacts 0f a. pluralil); of

lumps, a. lamp-supporting plate supported by the oui-turned ilu-nge of the Contact ring, und a ln'eaded insulating,r sleeve'adfip'ted to be secured on to the Contact ring and t0. cla-:np the lmnp-carrying plate between itself and the out-turned flange..

In Witness whereof, I have hereunto subscribed my naine in the presenee of two witnesses.

REUBEN B. BEXJAML?. lVitneSses M L. FARRAR, C. L. HOPKINS. 

